Question

the model shows the chemical structure of a molecule. this molecule is a building block of which type of biomolecule? carbohydrate protein lipid nucleic acid

Explanation:

The molecule shown is a fatty acid. Fatty acids are the building blocks of lipids. Carbohydrates have a different structure (e.g., monosaccharides like glucose have a ring - like structure in their most common form). Proteins are built from amino acids which have an amino (-NH₂) and a carboxyl (-COOH) group attached to a central carbon. Nucleic acids are made of nucleotides which have a sugar, a phosphate group, and a nitrogen - containing base.

Answer:

lipid